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Pollination efficiency of Honey bees and other pollinators in Cotton (Paperback)
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Pollination efficiency of Honey bees and other pollinators in Cotton (Paperback)
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Experiment was conducted at GKVK, Bangalore to study the
pollination efficiency of honey bees and other pollinators in
cotton PKVH5. Cotton flowers were visited by fourteen species of
insect pollinators on both CMS and R line of cotton; all of them
belong to order hymenoptera. The mean relative abundance of
honeybees (A. cerana, A. dorsata, A. florea) constituted 65 to 70 %
on CMS and 75 to 78 % on R line. Among honeybees, A. florea was
most predominant followed by A. cerana. The peak foraging activity
of honeybees showed a maximum at 13:00 h on adjacent and central
rows of CMS line and at 11:00 h on R line, whereas other
pollinators showed bimodal activity at 9:00h and 17:00h on both the
lines. In total moves of A. cerana within and between parental
lines, 15.25 per cent accounted for A to R and 8.75 per cent for R
to A visits. In the open pollination of CMS, the per cent of boll
set (82.66 and 80.33), seed yield per plant (82.76 and 74.58 g),
number of seeds per boll (20.33 and 17.33), test weight (12.24 and
12.46 g) and seed oil content (16.73 and 15.23 %) were
significantly higher in adjacent rows of CMS line than in central
ones.
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